Help!! I ate chicken salad!!!!

I was halfway through a chicken salad sandwich from the deli at my work before I realized I should Google it and it's on the no food list!!! I'm devastated. The sandwich was delicious but I'm so paranoid about listeria. I dunno what to do!!! Anyone had this problem? I'm only 6 weeks and if I miscarry now I'll never be able to forgive myself